Posted by **Anonymous** on Wednesday, April 6, 2011 at 2:00am.

A rumor spreads through a population in such a way that "t" hours after the rumor starts, the percent of people involved in passing it on is given by P(t)=100[e^(-t)-e^(-4t)]. What is the highest percent of people involved in spreading the rumor within the first 3 h? When does this occur?

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